<template>
  <view>
    <view class="goods-item">
      <!-- 商品左侧图片区 -->
      <view class="goods-item-left">
        <!-- :checked="goods.goods_state",动态绑定选中状态，v-if控制是否显示单选组件 -->
          <radio :checked="goods.goods_state" color="#c00000" v-if="showRadio" @click="radioClickHandler"></radio>
        <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
      </view>
      <!-- 商品右侧信息区 -->
      <view class="goods-item-right">
        <!-- 商品标题区 -->
        <view class="goods-name">{{goods.goods_name}}</view>
        <!-- 商品价格 -->
        <view class="goods-info-box">
          <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
          <!-- 商品数量 -->
          <uni-number-box @change="numberChangeHandler" :min="1" v-model="goods.goods_count" v-if="showNum"></uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    name:"my-goods",
    data() {
      return {
        // 默认图片，当商品没有图片的时候显示
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    // 自定义属性
    props: {
      // 接收父组件goods_list，传递的item项
      goods: {
        type: Object,
        default: {}
      },
      // 是否展示图片左侧的 radio
      showRadio: {
        type: Boolean,
        // 如果外界没有指定 show-radio 属性的值，则默认不展示 radio 组件
        defaults: false
      },
      // 是否显示数量
      showNum: {
        type: Boolean,
        defaults: false
      }
    },
    // 过滤器
    filters: {
      // 把数字处理为带两位小数点的数字
      tofixed(num){
        return Number(num).toFixed(2)
      }
    },
    // 事件处理函数
    methods: {
      // radio 组件的点击事件处理函数
      radioClickHandler(){
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change' , {
          // 商品ID
          goods_id: this.goods.goods_id,
          // 商品最新的勾选状态
          goods_state: !this.goods.goods_state
        })
      },
      numberChangeHandler(val){
       this.$emit('num-change' , {
         goods_id: this.goods.goods_id,
         goods_count: +val
       }) 
      }
    }
  }
</script>

<style lang="scss">
.goods-item{
  display: flex;
  width: 750rpx;
  box-sizing: border-box;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;
  
  .goods-item-left{
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    .goods-pic{
      display: block;
      width: 100px;
      height: 100px;
    }
  }
  .goods-item-right{
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;
    .goods-name{
      font-size: 13px;
    }
    .goods-info-box{
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .goods-price{
      font-size: 16px;
      color: #c00000
    }
  }
}
</style>